Open-end spinning device for an open-end spinning machine and open-end spinning machine

ABSTRACT

An open-end spinning device for an open-end spinning machine includes an individually drivable spinning rotor having a rotor cup accommodated in a rotor housing. An individual drive for the spinning rotor arranged in a drive housing. A receptacle for a cover element that closes the rotor housing during spinning operations is provided. The rotor housing defines a central support part fixable to a machine frame of the open-end spinning machine. The rotor housing is formed as one piece with the drive housing and the receptacle for the cover element.

FIELD OF THE INVENTION

The present invention relates to an open-end spinning device for anopen-end spinning machine with an individually drivable spinning rotor,the rotor cup of which is accommodated in a rotor housing, with anindividual drive for the spinning rotor, which is arranged in a drivehousing, and with at least one receptacle for a cover element thatcloses the rotor housing during the spinning operation. The rotorhousing is designed as a central support part, which is fixable at amachine frame of the open-end spinning machine. Moreover, the inventionrelates to an open-end spinning machine with a plurality of adjacentlyarranged workstations, each of which has an open-end spinning device ofthis type.

BACKGROUND

Various designs for mounting the open-end spinning devices at a machineframe of the open-end spinning machine have become known.

For example, it is known from DE 42 19 683 A1 to mount the individualcomponents of the open-end spinning devices directly at longitudinalsupports or longitudinal components of the machine frame of the open-endspinning device. The longitudinal components impart a high rigidity tothe spinning machine. Since the units are mounted directly at thelongitudinal components, the units retain their positions in relation toone another in the long term. The manufacture of the longitudinalcomponents is correspondingly complex, however, since the attachmentpoints for the components of the open-end spinning devices, for example,fastening bores, must be highly precisely introduced into thelongitudinal components.

According to another concept, it is known to arrange the individualcomponents of the open-end spinning device in a spin box frame, the spinbox frame then being mounted at the machine frame of the textilemachine. DE 197 17 737 A1 describes, for example, a spin box frame,which includes two lateral parts, which are fixable at the machine baseframe, and bracing elements arranged between the lateral parts. Thelateral parts are welded to the bracing elements. Preferably, a laserwelding process is used for this purpose, so that a distortion of theframe does not occur as a result of the welding. Fastening bores for thecomponents of the open-end spinning device can therefore be mounted inthe individual components of the spin box frame already prior to thewelding. Nevertheless, the configuration of the spin box frame made upof multiple components is complex.

In order to further reduce the production and the installation effort toinstall spinning devices, designs have also become known, in which thecomponents of the open-end spinning device are mounted at a centralsupport element. For example, DE 101 05 270 A1 provides that thespinning devices are arranged at a central functional support, whichaccommodates the components of the open-end spinning device and in turnis mounted at the machine frame of the spinning machine.

EP 1 664 401 B1 describes an embodiment in which the rotor housing ofthe open-end spinning device forms the central support element, which ismounted at the machine base frame. As a result, an additional functionalsupport is not necessary. Further components of the open-end spinningdevice are then mounted at the rotor housing directly or by means offurther supports.

SUMMARY OF THE INVENTION

A problem addressed by the present invention is that of providing anopen-end spinning device, which is cost-effectively manufacturable andreduces the installation effort. Additional objects and advantages ofthe invention will be set forth in part in the following description, ormay be obvious from the description, or may be learned through practiceof the invention.

The problem is solved with the aid of the invention as described andclaimed herein.

An open-end spinning device for an open-end spinning machine has anindividually drivable spinning rotor, the rotor cup of which isaccommodated in a rotor housing, an individual drive for the spinningrotor, which is arranged in a drive housing, and at least one receptaclefor a cover element that closes the rotor housing during the spinningoperation. The rotor housing is designed as a central support part,which is fixable at a machine frame of the open-end spinning machine.

It is provided that the rotor housing is formed as one piece with thedrive housing and the at least one receptacle for the cover element.

Moreover, an open-end spinning machine with a plurality of adjacentlyarranged workstations is provided, each of the workstations having anopen-end spinning device of this type.

Due to the fact that the drive housing is formed directly as one piecewith the rotor housing, additional installation work for mounting thedrive housing at the rotor housing can be dispensed with. In addition,as a result, the correct alignment of the drive with respect to the axisof the spinning rotor can also be achieved without adjustmentoperations. This is advantageous, in particular, when further functions,such as, for example, a bearing point of a magnetic bearing, areintegrated into the drive housing and/or the rotor housing, becausethese functions are then also aligned exactly with respect to thespinning rotor without adjustment operations.

In particular, however, due to the fact that the at least one receptaclefor the cover element is formed as one piece with the rotor housing, theaccuracy of the positioning of the fiber feed channel, which is arrangedin the cover element, and the take-off nozzle with respect to thespinning rotor is considerably improved. Due to the one-piece design,the machining of the rotor housing, in particular, the formation of stopsurfaces and fastening points or bores, can be carried out in a singleclamping setup. As a result, an absolutely precise position of thecomponents mounted at the rotor housing, in particular of the coverelement with the opening roller, with respect to the spinning rotor canalways be ensured. This not only simplifies the installation of theopen-end spinning device, but is also particularly advantageous withrespect to spinning technology and positively affects the yarn quality.

It is advantageous when the rotor housing has multiple, in particulartwo, receptacles for the cover element. The positioning of the coverelement and of the components arranged thereon, such as the fiber feedchannel and the take-off nozzle, with respect to the spinning rotor arefurther improved as a result. The receptacles are therefore referred toin the plural in the following. In principle, an embodiment having onlyone single receptacle, which is then preferably designed to be wider, isalso conceivable, however. The following comments and the description ofthe figures therefore also expressly relate to a rotor housing with onlyone receptacle.

It is particularly advantageous when the rotor housing is formed as acast part, wherein the drive housing and the receptacles for the coverelement are integrally cast onto the rotor housing. The rotor housingcan be particularly cost-effectively manufactured as a central supportelement as a result. In particular, it is advantageous when the rotorhousing is formed as a diecast part. This enables the manufacture of therotor housing with great precision. Provided this is necessary, themetal-cutting final machining can be carried out in a single clampingsetup, as described above.

It is also advantageous when the rotor housing has fastening devicesintegrally formed thereon, in particular spacer bushes integrally formedthereon, for mounting at the machine frame. This also facilitates themounting of the rotor housing at the machine frame and ensures that theopen-end spinning device is correctly positioned with respect to themachine transverse direction.

According to one advantageous enhanced embodiment, the rotor housing hasa cast-on frame, which includes the receptacles for the cover element.As a result, the rotor housing including the receptacles has a highrigidity, which ensures the exact positioning of the components withrespect to one another also after a longer period of operation.

It is also advantageous when the drive housing, which is cast onto therotor housing, has at least one bearing point for a magnetic bearingassembly for the spinning rotor. For example, at least one front bearingpoint for a front radial bearing of the magnetic bearing assembly can beintegrated into the rotor housing, which forms the central support part.The magnetic bearing is also automatically exactly positioned withrespect to the spinning rotor as a result. It is also conceivable, ofcourse, to integrate not only the front bearing point, but also the rearbearing point and, if necessary, also a bearing point for the drive inthe drive housing, which has been cast onto the rotor housing.

Moreover, it is advantageous when the receptacles for the cover elementdefine a swivel axis and the cover element is accommodated in thereceptacles of the rotor housing so as to be swivelable about the swivelaxis. A swivelable design of the cover element makes it possible, in aparticularly advantageous way, to bring the cover element out of anoperating position, in which the cover element closes the rotor housing,into a maintenance position, in which the cover element permits accessto the rotor housing.

It is also advantageous when the cover element includes an openingroller housing, which is preferably integrally formed on the coverelement. The opening roller housing and, thereby, the opening roller,are also automatically correctly positioned with respect to the spinningdevice and the rotor housing as a result. It is therefore alsoparticularly advantageous when the opening roller housing is formed asone piece with the cover element.

In order to be able to cost-effectively manufacture the cover elementwith the opening roller housing, it is also advantageous here when thecover element is formed as a cast part, wherein the opening rollerhousing is integrally cast onto the cover element.

In addition, it is also advantageous when the rotor housing includes astop for the cover element for positioning the cover element in theaxial direction of the spinning rotor. As a result, the take-off nozzle,which is accommodated in the cover element, and the rotor cup of thespinning rotor are automatically correctly positioned with respect toeach other upon the closing of the cover element.

It is particularly advantageous when the stop is designed to beadjustable, wherein the stop is preferably formed as an adjusting screw.As a result, it is possible, with respect to spinning technology, toalways set the correct position of the take-off nozzle with respect tothe rotor cup and possibly compensate for tolerances that are presentdespite precise production.

It is also advantageous when the stop is arranged in an area of therotor housing facing away from the receptacles for the cover element, inparticular at an end area of the rotor housing situated opposite thereceptacles. As a result, the stop is located at a greater distance fromthe swivel axis of the cover element, as the result of which theadjustment is facilitated.

According to another enhanced embodiment, it is advantageous when therotor housing has at least one positioning device for positioning thecover element in an axial direction of the swivel axis. As a result, thecover element is automatically brought into the correct lateral positionwith respect to the swing axis upon closing and is fixed in this correctposition when the cover element is closed.

It is advantageous when the positioning device is cast directly onto therotor housing. As a result, an additional installation step for thepositioning device is not necessary and the correct lateral alignment ofthe cover element with respect to the spinning rotor is always ensuredas a result. Preferably, the positioning device is designed to bebifurcated. As a result, the cover element is correctly positioned inboth axial directions of the swing axis.

Moreover, it is advantageous when the positioning device has a plasticcoating. The plastic coating can, for example, dampen noises during theclosing of the cover element and ensure a gentle closing in thepositioning of the cover element.

BRIEF DESCRIPTION OF THE DRAWINGS

Further advantages of the invention are described with reference to theexemplary embodiments represented in the following, wherein:

FIG. 1 shows an open-end spinning machine in a schematic overviewrepresentation,

FIG. 2 shows a workstation of an open-end spinning machine with anopen-end spinning device in a schematic, partially cut side view,

FIG. 3 shows a perspective representation of a rotor housing accordingto a first embodiment,

FIG. 4 shows a perspective representation of a rotor housing accordingto a second embodiment,

FIG. 5 shows a schematic, cut side view of a rotor housing with a coverelement mounted thereon, and

FIG. 6 shows a schematic top view of a positioning device.

DETAILED DESCRIPTION

Reference will now be made to embodiments of the invention, one or moreexamples of which are shown in the drawings. Each embodiment is providedby way of explanation of the invention, and not as a limitation of theinvention. For example features illustrated or described as part of oneembodiment can be combined with another embodiment to yield stillanother embodiment. It is intended that the present invention includethese and other modifications and variations to the embodimentsdescribed herein.

In the following description of the exemplary embodiments, features thatare identical or at least comparable with respect to their design and/ormode of operation are provided with identical reference signs. Moreover,these features are explained in detail only at their first mention,while only the differences from the previously described exemplaryembodiments are discussed in the subsequent exemplary embodiments.Moreover, for the sake of clarity, often only one or only a few ofseveral identical components and/or features is/are labeled.

FIG. 1 shows a schematic front view of an open-end spinning machine 2.The open-end spinning machine 2 has, in a way known per se, a pluralityof adjacently arranged workstations 34, which can be arranged betweentwo frames 33 on one or also on both longitudinal sides of the open-endspinning machine 2. Each of the workstations 34 has, also in a knownway, an opening roller 9 for opening a supplied fiber material 25 (seeFIG. 2 ) into individual fibers and an open-end spinning device 1 forspinning the fiber material 25 into a thread 26. The spun thread 26 isthen drawn off by means of a take-off device 27 and wound onto a package29 by means of a winding device 28. For the purpose of controlling theprocesses at the open-end spinning machine 2, the spinning machine alsohas a control unit 35, which can interact with further control units 35(not shown) arranged at the individual workstations 34.

FIG. 2 shows a detailed representation of a workstation 34 of anopen-end spinning machine 2 of this type in a partially cut side view.As described above with respect to FIG. 1 , the fiber material 25 issupplied to the open-end spinning device 1 and opened into individualfibers by means of the opening roller 9 and, from there, supplied to theopen-end spinning device 1 through a fiber feed channel (not shownhere).

The open-end spinning device includes, in a usual way, a spinning rotor3, the rotor cup 4 of which revolves in a rotor housing 6 and the rotorshaft 5 of which is rotatably mounted in a drive housing 7. For thispurpose, the spinning rotor 3 is driven by means of an individual drive8, which is also arranged in the drive housing 7, and is mounted in amagnetic bearing assembly 16. The magnetic bearing assembly 16 includesa front radial bearing 17 and a rear radial bearing 18. Moreover, thespinning rotor 3 is supported in the axial direction by an axial bearing19, which can also be designed as a magnetic bearing, but also as an airbearing or any other type of bearing. The rotor housing 6 is fixed, withthe drive housing 7, at a machine frame 12 of the open-end spinningmachine 2.

The rotor housing 6 is subjected to suction during the spinningoperation, for the purpose of which the rotor housing 6 is connected toa suction channel 31 via a suction connection 30. During the spinningoperation, the rotor housing 6 is closed with a cover element 11, which,in the present case, is fixed in receptacles 10 of the open-end spinningdevice 1 so as to be swivelable about a swivel axis 20. In order to openthe rotor housing 6, the cover element 11 can therefore be swiveled outof the closed position represented by solid lines into the open positionrepresented by dash-dotted lines. The cover element 11 is provided withan extension 36, which supports a thread take-off nozzle 37 andprotrudes into the rotor cup 4 of the spinning rotor 3 during thespinning operation. The newly spun thread 26 is drawn off via the threadtake-off nozzle 37. The extension 36 can also be designed as a channelinsert adapter exchangeably arranged in the cover element 11, as shownin FIG. 5 . In the present case, the cover element 11 simultaneouslysupports the opening roller 9, so that the cover element 11 is formed asone piece with an opening roller housing 21.

FIG. 3 shows a first embodiment of a rotor housing 6 according to theinvention. The rotor housing 6 is designed as a central support part,which can be fixed by means of fastening devices, such as, for example,fastening bores 32, at a machine frame 12 (see FIG. 2 ) and at whichfurther components of the open-end spinning device 2 can be arranged.The rotor housing 6 also includes, in addition to the housing for thespinning rotor 3 (see FIG. 2 ), the drive housing 7 and the receptacles10 for the cover element 11. The receptacles 10 include, in the presentcase, bores, in which the cover element 11 is swivelably mounted andwhich, therefore, form a swivel axis 20 for the cover element 11.

These three components, rotor housing 6, drive housing 7, andreceptacles 10, are formed as one piece with one another. Therefore,these can be advantageously designed as a highly compact cast part,which combines the aforementioned functions in one component and alsoenables the integration of numerous further functions and components ofthe open-end spinning device 1. It is particularly advantageous that allfunctional and contact surfaces and fastening devices, such as bores andthe like, can be formed in one single clamping setup of the rotorhousing 6. In other words, the rotor housing 6 needs to be clamped onlyone time for the machining. All metal-cutting machining steps can thenbe carried out on the rotor housing 6 without re-clamping the rotorhousing 6. As a result, an extremely accurate position of the openingroller housing 21 and of the cover element 11 with respect to the rotorhousing 6 can be ensured. The rotor housing 6 or the central supportpart can be produced highly cost-effectively despite the precisemanufacture due to the design as a cast part and the machining in onlyone single clamping setup. Due to the highly precise positioning of thecover element 11 with the extension 36 and the thread take-off nozzle37, considerable spinning technology-related advantages are alsoachieved and a high-quality yarn can be produced. Complicated adjustmentoperations at the open-end spinning device 1 can be dispensed with dueto the one-piece design of the rotor housing 6 with the drive housing 7and the receptacles 10.

In order to still support the exact positioning of the cover element 11with respect to the rotor housing 6, a stop 22 can also be provided,which is explained in greater detail further below with reference toFIG. 5 . By means of this stop 22, the cover element 11 can be correctlypositioned with respect to the axial direction of the spinning rotor 3during closing and in the closed position of the cover element 11.

FIG. 4 shows another embodiment of a rotor housing 6 according to theinvention. In contrast to the rotor housing 6 from FIG. 3 , the presentrotor housing 6 has a cast-on, peripheral frame 14, which includes thereceptacles 10 for the opening roller housing 21 and the cover element11. The two receptacles 10 are connected by a cross brace. The frame 14is therefore formed by the two receptacles 10 and, in the present case,a cross brace. As a result, the rotor housing 6 has a particularly highrigidity, which further supports the exact positioning of the coverelement 11 with respect to the rotor housing 6 with the spinning rotor3.

In the rotor housing 6 from FIG. 4 , spacer bushes 13, as fasteningdevices, are cast directly onto the rotor housing 6. The spacer bushes13 enable bolting directly onto a vertical wall of the machine frame 12(see FIG. 2 ). The mounting of the rotor housing 6 at the open-endspinning device 1 is facilitated as a result. Of course, such spacerbushes 13 can also be cast on in the case of the rotor housing 6 fromFIG. 3 , in order to correctly position the rotor housing 6 at themachine frame 12.

A positioning device 23 is also apparent at the rotor housing 6 shown inthe present case. By means of the positioning device 23, the coverelement 11 can be positioned, during closing, in a correct position withrespect to a direction transverse to the axis of the spinning rotor 3,i.e., in a width direction of the rotor housing 6 in the present case.In other words, by means of the positioning device 23, the cover element11 is correctly positioned in an axial direction of the swivel axis 20with respect to the rotor housing 6 and, thereby, the spinning rotor 3.The positioning device 23 can include only one positioning element 41 asshown in the present case. The positioning element 41 can be wrappedaround, for example, by a bifurcated counterpart (not shown) at thecover element 11, as the result of which the cover element 11 isunambiguously positioned. Alternatively, it would also be conceivable toarrange a second positioning element 41 or a second positioning device23 spaced apart from the positioning device 23 shown, in order tosecurely position the cover element 11 in both axial directions of theswivel axis 20. The positioning device 23 is also advantageously castdirectly onto the rotor housing 6, as the result of which the correctpositioning of the cover element 11 is always ensured without anyadjustment effort. Similarly, due to the cast-on positioning device 23,the effort required to install the rotor housing 6 and the open-endspinning device 1 is further reduced.

FIG. 5 shows an open-end spinning device 1 in a schematic, cutrepresentation. In contrast to FIGS. 3 and 4 , the cover element 11 isarranged in the receptacles 10, so that the two components, the rotorhousing 6 and the cover element 11, are represented in interaction. Asdescribed above with reference to FIG. 2 , the cover element 11 alsoincludes the opening roller housing 21 integrally formed onto the coverelement 11 and is swivelably mounted at the receptacles 10 of the rotorhousing 6, for example, by means of tabs 38. The extension 36 of thecover element 11 is also apparent. The extension 36 of the cover element11 is designed in the present case as a channel insert adapter, which isinsertable into the cover element 11.

According to the present representation, the spinning rotor 3 is shownin its operating position accommodated in the rotor housing 6. The rotorcup 4 is located within the rotor housing 6, while the rotor shaft 5 islocated within the drive housing 7, which has been cast onto the rotorhousing 6.

Moreover, the front radial bearing 17 of the magnetic bearing assembly16 is also apparent in the present representation. As is apparent fromFIG. 5 , the drive housing 7 and, thereby, the rotor housing 6 connectedto the drive housing 7 include the front bearing point 15 for the frontradial bearing 17. Fastening bores 32 are provided in the drive housing7 for this purpose, the fastening bores 32 enabling a mounting of thefront radial bearing 17. According to the present representation, thedrive housing 7 also includes fastening bores 32, which enable amounting of the individual drive 8 in the drive housing 7. The rearradial bearing 18 (not visible here) can be mounted, for example, in acover element 11, which is insertable into the drive housing 7.Alternatively, it would also be possible, however, to also mount therear radial bearing 18 directly in the drive housing 7.

Moreover, a stop 22 for the cover element 11 is also provided in theopen-end spinning device shown here. By means of the stop 22, the coverelement 11 and, thereby, the thread take-off nozzle 37 are correctlypositioned with respect to the axis of the spinning rotor 3. The stop 22is designed in the present case as an adjusting screw, which is arrangedso as to be axially parallel to the axis of the spinning rotor 3.Preferably, the stop 22 is arranged centrally with respect to theopen-end spinning device 1 over the axis of the spinning rotor 3, as isalso apparent from FIGS. 3 and 4 .

It is also advantageous when the stop 22 is arranged in an area of therotor housing 6 facing away from the receptacles 10 for the coverelement 11, as shown in the present case. For example, in the presentcase, the stop 22 is arranged in an end area 39 of the rotor housing 6situated opposite the receptacles 10. As a result, the stop 22 or theadjusting screw has a great distance to the swivel axis 20, whichfacilitates the adjustment of the stop 22. By means of such anadjustable stop 22, the distance between the thread take-off nozzle 37and the spinning rotor 3 can be set in various ways and, for example,adapted to spinning technology-related conditions in a certainapplication.

It is also possible to fix the position of the cover element 11 withrespect to the rotor housing 6 one time after the initial installationof the cover element 11 and, as a result, take possible tolerances intoaccount, which tolerances can arise due to the installation of themagnetic bearing assembly 16 and the accommodation of the spinning rotor3. It can also be provided that the stop 22 is not to be displaced againafter the initial adjustment of the stop 22. If the stop 22 is designedas an adjusting screw, the adjusting screw can also be secured againsttwisting, for example. Screw locking devices, for example, or alsoscrews that include a special head are also conceivable in this case.

In order to also prevent the stop 22, specifically the adjusting screwin this case, from twisting during operation, the adjusting screw canalso be clamped against the rotor housing 6 with an O-ring 40 as shownhere.

FIG. 6 also shows another embodiment of a positioning device 23 in aschematic top view. In contrast to the positioning device 23 from FIG. 4, the present positioning device 23 includes two positioning elements 41situated opposite each other. In the present case, the positioningdevice 23 is therefore designed to be bifurcated. As the cover element11 is closed, a corresponding counterpart (not shown) arranged at thecover element 11 enters the space between the two positioning elements41 as indicated by the arrow, as the result of which the cover element11 in turn is positioned exactly in both axial directions of the swivelaxis 20 (see FIGS. 3 and 4 ). The positioning device 23 shown in thepresent case also has a plastic coating 24, which is applied on each ofthe positioning elements 41. The positioning of the thread take-offnozzle 37 with respect to the rotor cup 4 of the spinning rotor 3 isfurther improved as a result.

The present invention is not limited to the represented and describedexemplary embodiments. Modifications within the scope of the claims arealso possible, as is any combination of the described features, even ifthey are represented and described in different parts of the descriptionor the claims or in different exemplary embodiments, provided nocontradiction to the teaching of the independent claims results.

LIST OF REFERENCE SIGNS

1 open-end spinning device2 open-end spinning machine3 spinning rotor4 rotor cup5 rotor shaft6 rotor housing7 drive housing8 individual drive9 opening roller10 receptacle11 cover element12 machine frame13 spacer bush14 frame15 bearing point16 magnetic bearing assembly17 front radial bearing18 rear radial bearing19 axial bearing20 swivel axis21 opening roller housing22 stop23 positioning device24 plastic coating25 fiber material26 thread27 take-off device28 winding device29 package30 suction connection31 suction channel32 fastening bore33 frame34 workstation35 control unit36 extension37 thread draw-off nozzle38 tab39 end area

40 O-ring

41 positioning element

1-15. (canceled)
 16. An open-end spinning device for an open-endspinning machine, comprising: an individually drivable spinning rotorhaving a rotor cup accommodated in a rotor housing; an individual drivefor the spinning rotor arranged in a drive housing; at least onereceptacle for a cover element that closes the rotor housing duringspinning operations; the rotor housing defining a central support partfixable on a machine frame of the open-end spinning machine; and therotor housing formed as one piece with the drive housing and the atleast one receptacle for the cover element.
 17. The open-end spinningdevice of claim 16, wherein the rotor housing is formed as a cast partsuch that the at least one receptacle for the cover element isintegrally cast onto the rotor housing.
 18. The open-end spinning deviceof claim 16, wherein the rotor housing comprises fastening devicesintegrally formed thereon to fix the rotor housing to the machine frame.19. The open-end spinning device of claim 16, wherein the rotor housingcomprises a cast-on frame that defines the at least one receptacle forthe cover element.
 20. The open-end spinning device of claim 16, whereinthe drive housing comprises at least one bearing point of a magneticbearing assembly for the spinning rotor.
 21. The open-end spinningdevice of claim 16, wherein the at least one receptacle for the coverelement defines a swivel axis, and further comprising the cover elementaccommodated in the at least one receptacle and swivelable about theswivel axis.
 22. The open-end spinning device of claim 21, wherein thecover element comprises an opening roller housing integrally formed onthe cover element.
 23. The open-end spinning device of claim 22, whereinthe cover element is formed as a cast part, wherein the opening rollerhousing is integrally cast onto the cover element.
 24. The open-endspinning device of claim 21, wherein the rotor housing comprises a stopfor the cover element to position the cover element in the axialdirection of the spinning rotor.
 25. The open-end spinning device ofclaim 24, wherein the stop is adjustable.
 26. The open-end spinningdevice of claim 24, wherein the stop is arranged in an area of the rotorhousing facing away from the at least one receptacle for the coverelement.
 27. The open-end spinning device of claim 21, wherein the rotorhousing comprises a positioning device that locates the cover element inan axial direction of the swivel axis.
 28. The open-end spinning deviceof claim 27, wherein the positioning device is cast directly onto therotor housing.
 29. The open-end spinning device of claim 28, wherein thepositioning device comprises a plastic coating.
 30. An open-end spinningmachine, comprising: a plurality of adjacently arranged workstations;and wherein each of the workstation comprises the open-end spinningdevice of claim 16.